SST25PF040B-80-4C-QAE-T

Memory IC Overview

The SST25PF040B-80-4C-QAE-T is a 4 Mbit SPI Serial Flash memory manufactured using Microchip's SuperFlash technology. It operates on a single voltage supply of 2.3V to 3.6V and supports clock frequencies up to 80 MHz at 2.7–3.6V, or 50 MHz at 2.3–2.7V. The device features uniform 4 KByte sectors and 32/64 KByte overlay blocks for flexible erasure. It includes hardware write protection via the WP# pin and software block protection bits in the status register.

Memory IC Feature Summary

• SuperFlash Technology: Utilizes split-gate cell design and thick-oxide tunneling injector for superior reliability and lower power consumption compared to alternative flash technologies.
• Flexible Erase Architecture: Supports uniform 4 KByte sectors with 32 KByte and 64 KByte overlay blocks for versatile data management.
• Hardware Write Protection: The WP# pin enables lock-down functionality for the status register block-protection bits, preventing unauthorized modification.
• Auto Address Increment (AAI): Allows sequential programming of multiple bytes without reissuing address commands, reducing total programming time.

Memory IC Applications

• Code storage for microcontrollers and embedded systems
• Data logging applications requiring non-volatile retention
• Firmware updates for industrial control devices
• Configuration storage in consumer electronics

Memory IC Procurement Notes

Verify component authenticity through authorized Microchip distributors. Confirm package type matches system requirements, as the series offers SOIC and WSON options. Check datasheet revisions for any functional updates. Ensure operating voltage aligns with the 2.3V to 3.6V specification. Validate temperature range compliance for commercial applications.

Memory IC Selection Notes

Select this component for designs requiring high-speed serial access and robust data retention. Consider the 80 MHz clock capability for performance-critical interfaces. Evaluate the need for hardware write protection if security against accidental writes is required. Compare power consumption metrics against other NOR flash options for battery-operated systems.

Memory IC Part Context

This part belongs to the SST25PF family of SPI Serial Flash memories. It is an enhanced version offering improved operating frequency and lower power consumption over previous generations. The device is built on CMOS SuperFlash technology, distinguishing it from standard NOR flash by its specific cell architecture designed for better manufacturability and endurance.

Memory IC Replacement Considerations

Microchip recommends using the SST25VF040B as a replacement for the SST25PF040B series. Verify pin compatibility and electrical specifications before substitution. Note that the SST25PF040B is marked as an obsolete device in official documentation.